芝商所：上调保证金致金银铂钯期货价格下跌

Group 1 - The core point of the article is that the CME Group has raised margin requirements for traders, leading to a reversal in the prices of gold and silver futures after a significant increase in the previous week [1][2]. - Gold futures fell over 2% in early trading, while silver futures dropped more than 5% after reaching record highs during the overnight session [1][2]. - The margin increase is described as part of a "normal market volatility assessment" by the CME Group, with adjustments taking effect on Monday following the announcement made on Friday [1][2]. Group 2 - The price reversal also affected platinum and palladium futures, which saw declines of 7% and 11% respectively in early trading [1][2].